$page = file_get_contents("http://www.ferra.ru/ru/byt/news/2016/01/11/CES2016-Samsung-POWERbot-Turbo-Essential-Wi-Fi" . $val);
preg_match('#<div class="newsbody">([^<]+)</div>#', $page, $descr);
var_dump($descr);
$html = <<<HTML
<div class="header">
<nyan-cats></nyan-cats>
</div>
<div class="content">
<div class="newsbody">
some random content
<span>HOT</span>
</div>
</div>
HTML;
$ok = preg_match('#<div class="newsbody">(.+?)</div>#s', $html, $descr);
var_dump($ok, $descr);
int(1)
array(2) {
[0]=>
string(86) "<div class="newsbody">
some random content
<span>HOT</span>
</div>"
[1]=>
string(58) "
some random content
<span>HOT</span>
"
}